.header {
    position: relative;
    background-color: #ffffff;
    box-sizing: border-box;
    margin-left: 181px;
    width: 87%;
    height: 60px;
    font-size: 26px;
    color: #253041;
  }
  .collapse-btn {
    float: left;
    padding: 0 21px;
    cursor: pointer;
    line-height: 60px;
  }
  .header-right {
    float: right;
    padding-left: 30px;
    display: flex;
    height: 60px;
    align-items: center;
  }
  .user-avator {
    margin-left: 30px;
  }
  .user-avator img {
    display: block;
    width: 50px;
    height: 50px;
    margin-right: 20px;
    border-radius: 50%;
  }
  .btn-fullscreen {
    transform: rotate(45deg);
    margin-right: 5px;
    font-size: 24px;
  }
  .user-name {
    margin-right: 80px;
  }
  .el-dropdown-link {
    color: #409eff;
    cursor: pointer;
  }
  .example-showcase .el-dropdown-link {
    cursor: pointer;
    color: var(--el-color-primary);
    display: flex;
    align-items: center;
  }